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Home >> Audi >> 2011 >> S4 Automatic DCT >> Repair and Diagnosis >> Drivelines & Axles >> Driveshaft & Universal Joints >> Final Drive & Driveshaft - Rear Final Drive (Sedan) (As Of 05.2015) >> 39 Final Drive, Driveshaft >> Final Drive, Disassembling And Assembling >> Hydraulic Control Unit, Removing And Installing >> Hydraulic Control Unit, Removing And Installing, 0BE, 0BF >> Removing

Hydraulic Control Unit, Removing And Installing, 0BE, 0BF: Removing

-- Place the vehicle on a lift.

-- Lower the back section of the exhaust system just a little and secure it. If necessary remove the back section of the exhaust system. Refer to EXHAUST PIPES/MUFFLERS for engine code CALA, EXHAUST PIPES/MUFFLERS for engine codes CAED, CAEB, CPMB, CPMA, or EXHAUST PIPES/MUFFLERS for engines CCBA, CGXC, CTUB .

NOTE:

A second technician is needed to help remove the rear section of the exhaust system.

-- If equipped, remove the screws -arrows- and remove the wiring harness bracket -1- from the rear final drive. 

Fig 1: Identifying Rear Final Drive Wiring Harness Bracket
GWWA39-10360Courtesy of AUDI OF AMERICA, LLC
NOTE:

Mark the Oil Pressure/Temperature Sensor -- and the Clutch Valves -- connectors -2-.

-- Disconnect the connectors -2- from the Oil Pressure/Temperature Sensor -- and the Clutch Valves --.

-- Disconnect the connector -4- from the All Wheel Drive Pump -V415-.

-- Unclip the wiring harness -3- from the final drive and the subframe and tie it up -5 through 7-.

-- Place the Drip Tray under the rear final drive.

-- Drain the ATF from the rear final drive. Refer to ATF, DRAINING AND FILLING .

-- Drain the gear oil from the rear final drive. Refer to GEAR OIL, DRAINING, 0BE, 0BF .

-- Remove the All Wheel Drive Pump V415. Refer to All Wheel Drive Pump -V415-, REMOVING AND INSTALLING .

NOTE:

The All Wheel Drive Pump V415 must be removed in order to loosen and tighten the nut on the right line to the hydraulic control unit. Refer to "Loosen the left -6- and right -7- lines to the hydraulic control unit -1- one turn -arrows A- and remove them from the chambers -arrows B-", below.

-- Loosen the left -6- and right -7- lines to the hydraulic control unit -1- one turn -arrows A- and remove them from the chambers -arrows B-. 

Fig 2: Identifying Hydraulic Control Unit
GWWA39-10376Courtesy of AUDI OF AMERICA, LLC

-- Remove the screws -2 through 5- and remove the hydraulic control unit -1- with the seal.